[full-ci] chore: bump reva to 2.49.1-0.20260903122659-26f34ec05774

[dschmidt]

• reva bump to 2.49.1-0.20260903122659-26f34ec05774 (current reva main, no tag beyond v2.49.0 yet)
• opencloud version left at 7.5.0+dev, interim bumps do not touch it

Reva changes since v2.49.0, dependency bumps left out:

• fix(decomposedfs): write arbitrary metadata in one go
• refactor(ocdav): name the new props kebab-case like the rest
• feat(ocdav): expose the video, motionPhoto and livePhoto facets
• chore: remove a few unused helpers
• chore: remove siteacc service and package
• enhancment(shares/jsoncs3): Shortcut migration on fresh system
• Backport and fix of space membership expired event (Backport and fix of space membership expired event reva#766)
• mime: map the Nikon NRW raw extension

The siteacc/mentix removal drops github.com/prometheus/alertmanager from the indirect requirements, which is where most of the vendor churn comes from.

Draft on purpose: reva release PR opencloud-eu/reva#786 (Release 2.50.0) is still open, so this can be retargeted to the v2.50.0 tag once that is merged.

[github-actions]

Label error. Requires at least 1 of: Type:Bug, Type:Enhancement, Type:Feature, Type:Breaking-Change, Type:Test, Type:Documentation, Type:Maintenance, Type:Security, Type:Dependencies, Type:DevOps, dependencies. Found:

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

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🟢 Coverage ∅ diff coverage · -0.02% coverage variation

Metric	Results
Coverage variation	✅ -0.02% coverage variation (-1.00%)
Diff coverage	✅ ∅ diff coverage

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Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (61037cc)	88237	20687	23.44%
Head commit (fc28030)	88237 (+0)	20673 (-14)	23.43% (-0.02%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#3458)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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